Measuring and testing – Dynamometers – Responsive to torque
Patent
1984-03-30
1986-02-04
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
173 12, B25B 2314, G01L 524
Patent
active
045677794
ABSTRACT:
A torque monitoring apparatus includes a Make-Up Tong (10) and a Break-Out Tong (12). The Make-Up Tong (10) is connected to one side of a threaded connection and the Break-Out Tong (12) is connected to the other side of the connection. A chain (22) attached to a winch (24) is operable to activate the Make-Up Tong (10) to torque the connection. A snub line (28) attached to the distal end of the Break-Out Tong (12) restrains movement thereof. A load cell (30) disposed in series with the snub line (28) measures the restraining force thereof. The angular position between the snub line (28) and the Break-Out Tong (12) is maintained constant such that the moment arm utilized for a torque calculation is constant. Therefore, the linear force is directly proportional to the torque and adjustment for angular deviations is not required.
REFERENCES:
patent: 1734482 (1929-11-01), Greve
patent: 2527456 (1950-10-01), Schmeling
patent: 3606664 (1971-09-01), Weiner
patent: 4444273 (1984-04-01), Ruby
Analog Data Systems, Inc.
Howison Gregory M.
Mills Jerry W.
Ruehl Charles A.
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